Hydraulic vise



' Nov. 23, 1943. w, s uc I 2,334,797

HYDRAULIC VISE Filed Oct. 24, 1941 2 Sheets-Sheet l Nov. 23, 1943. w, s uc 2,334,797

HYDRAULIG- VISE Filed 0 st. 24, 1941 2 Sheets-Sheet 2 my I ' Patented Nov. 23, 19 43, a v

UNlTED stares PATENT. OFFICE Warren J. Shockley, Brawley, Calif. I Application @ctober 2d, 1941, Serial No. @1632! 2 Claims.

The present invention is directed to improvements in fluid operated vises, either liquid or gas.

The primary object of the invention is to pro- .vide a vise so constructed that upon operating the means for controlling the actuating fluid the movable jaw will be moved and caused to clamp the work between the fixed and movable jaw with such force that any danger of the work slipping or becoming accidentally disengaged from between the jaws is positively prevented.

Another object of the invention is to provide a vise of this type constructed in such manner that the body of the vise may be rotated to various positions to enable the operator to place the work between the jaws and remove the same therefrom in any position he may bestanding.

Still another object of the invention is to provide a vise wherein thepiston rod and its head is maintained in fixed position, but the rod or 20 tube in which the head is mounted is freely movable with the movable law, which places the piston and rod under tension instead of compression, as in the usual type of air or hydraulic 'vises.

With these and other objects in view, this invention resides in the novel features of construction, formation, combination and arrangement of parts to be hereinafter more fully described and claimed, and illustrated in the accompanying drawings, in which:

' Figure 1 is a side view; Figure 2 is an end view, on line 2-2 of Figure 1;

Figure 3 is a side view, the jaws being open;

Figure 4 is a, longitudinal sectional view, the jaws open;

Figure 5 is a similar view, the jaws closed.

Figure 6 is an enlarged sectional View of the piston head connection;

Figure 7 is a sectional view on line 1-1 of A Figure 6.

Referring to the drawings, I designates a stand or bench, and upon which is mounted the vise.

Bolted upon the top of the stand l is a supporting plate 2, inwhich is formed a bearing 3, and mounted in the bearing is a plug 4, said plug having upon its upper end a threaded extension 5. -Extending through the plug and extension is a fluid conducting passage 6, the purpose of which will later appear.

The vise includes a body in which is formed a threaded opening 8, and in which the extension is engaged so that the vise may be rotated, as desired, upon the plate 2 manually.

The body is formed with a fixed Jaw 9, and is further provided with a bearing l0, said bearing being alined with the cylinder ii extending from the body.

The movable jaw l2 comprises a stem 53 adapted for sliding movement in the hearing it and cylinder 1 I. In the stem i3 is a tube l lhaving in its forward end athreaded plug [5, the stem of the pipe i9 is fixed a piston head 28, there being ducts 2! formed in the pipe for the passage of fluid therefrom into the tube It.

The outer end of the tube I9 is suitably fixed to a pipe assembly 22 in which is mounted a valve 23. The pipe 2% of the assembly passes through the body 1 .and is connected to the plug 4 by a conventional type of swiveled coupling 2%, and in fluid communication with the passage 6 so that fluid may pass therefrom, and through the pipe assembly into the tube 19.

Connected to the lower end of the plug 6 and communicating with the passage 6 thereof is a fluid conducting pipe 25. The pipe 25 leads from a hydraulic pump unit 26 of conventional form and includes a piston containing cylinder 21.

The cylinder 21 has pivotally connected thereto the inner end of a hand lever 28, there being a,

-cylinder 21 in its uppermost position, and when the vise is at rest, the lower end of said spring is connected with the hand lever 28 at a jacent the piston rod 30.

A foot lever 3| is pivotallyconnected to the stand I and to the hand lever 28 by a rod and link 32 and 33, respectively.

Upon operating the hand lever 28 fluid, preferably oil, under pressure will pass from the pipe point ad- 25 into the pipe assembly 22, and from thence through the ducts 2| of the tube I9 into the cylthe jaw l2 to move toward the jaw 9 for clamping the work between saidlflaws. This is of course due to the fact that the piston 20 is stationary and the force of the fluid under pressure will exert pressure upon the cap l8 and piston head 28.

When the valve 28 is open th jaw l2 may be moved outwardly by the operator upon grasping the same, and in this manner the work can be placed between the Jaws and removed therefrom with ease.

A valve 38 is associated with the pump unit 28 to control the fluid therein.

If more leverage is desired a tubular handl 34' may be placed upon the hand lever 28, and, if desired the foot lever 8| may also be actuated.

Since the body I is rotatably engaged with the plug 4 and the pipe 24 is connected thereto by the coupling 24' the body may be rotated to any position to suit the convenience of the operator.

The body may be held in any of its adjusted positions by the conventional form of clamping post 39.

To prevent building up oi pressure in the tube ll in advance or the piston head 20, which would tend to retard the tree sliding movement or the stem i3, bleed openings 36 and 31 are formed in the stem and tube, respectively. I

What is claimed is:

1. A vise having a body having a bearing therein, a fixed jaw on the body, a slidable jaw having a stem movable in the bearing, a tube fixed within the stem, a pressure fluid conducting pipe fixed with the body and extending into the tube, a piston head in the tube and fixed to the pipe, said pipe having ducts therein, and means for forcing fluid under pressure through the pipe and from the ducts into the tube between the head and one end of the tube.

2, A vise comprising a fixed and a movable jaw, the movable Jaw including a hollow stem slidable in the fixed jaw, a pistonhead in the stem, a fluid conducting pipe fixed relative to the fixed jaw and extending into the stem and fixed to the piston head, said pipe having ducts therein, and means for forcing pressure fluid under pressure through the pipe and from the ducts into the stem between the piston head and one end of the go stem. 

